Touring for major rock bands is big business, as any rock fan has surely acknowledged by now. For those rarified artists who tour stadiums, it’s really big business. Between ticket and merch sales, there are millions to be made on a tour of that scale.

When head FOO FIGHTERS Dave Grohl fell off the edge of the stage at a concert in Sweden earlier this month, dislocating his ankle and breaking his fibula, he finished the show, able to salvage the single gig. But, the band also had to cancel the remaining seven shows of the the their European tour.

Billboard speculates that the cancellation will cost the band about $10 million “in lost fees and travel expenses not offset by box office revenue.”

But, they suppose, the financial hit will be considerably harder if the band have to cancel shows on their upcoming North American tour, which is scheduled to start on July 4 in Washington, D.C., twenty years to the day from the release of the very first FOO FIGHTERS album.

The FOO FIGHTERS haven’t indicated that the U.S. shows are in danger of being cancelled, but Billboard reported that they got a “no comment” when they asked “the band’s handlers” about whether or not the tour will begin as planned next week.

Billboard writes that the band had to pay for their gear to be shipped to Europe, and they would have paid to rent sound, light and production equipment and trucks, and many of those expenses aren’t recoupable.

The band’s own equipment then must be transported back to the U.S. at at coast that could be as much as $200,000, which they would have paid for anyway, but would have been expensed against their concert gross. Then there’s also employee salaries, per diems, and hotels as well as significant marketing and PR expenses.

Ideally, these millions of dollars might be covered by “contingency” insurance, but this largely depends on the level of insurance that the band opted for and the clauses for which they would be covered. Common sense would figure that if losing the frontman to a broken leg wasn’t covered, not much would be.

But, this also begs the question as to why manager John Silva and agent Don Muller of William Morris Endeavor Entertainment both declined to comment for the Billboard story, as it would be easy for the management to acknowledge that insurance was covering all this if it was, and seems to indicate that some aspect of the financial losses for FOO FIGHTERS tour cancelations might be up in the air.

As for where we go from here, Grohl promises to be back “as soon as possible,” but there is still no clue as to when that will be, and whether some American dates will become victim to this injury.